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BrightSign Compact

This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Roku assumes no
obligation regarding future manufacturing unless otherwise agreed to in writing.

www.rokulabs.com

(2) Power LED comes on, no serial port output

Check U15,

U36, S2

Check U3,

Y3, C186, C187,
R134, Nand flash
U25

Check U20, L6, C223

Is there 1.2V DC

at TP20?

Is there 16MHz at

TP7?

Is RESET_L high at

pin 1 of U15 after

powerup?

Yes

No serial

port output

Is there 2.5V DC at

TP18?

Check U18, L5, C212

Yes

Check U3

Check nand
contents U25,
check nand bus,
check sdram

Is SYS_RES_OUT_N

high at C188 after

powerup?

Check U25
for good
program and
good solder
joints, check
SDRAM

Yes

Содержание BrightSign Compact

Страница 1: ...Roku BrightSign Compact Hardware Guide PCBA C Version 1 Saratoga CA USA 1 ...

Страница 2: ...MECHANICAL 12 THEORY OF OPERATION 13 POWER SUPPLY 13 RESET 13 PNX8935 CPU 13 BUILT IN FLASH 13 SDRAM 13 SERIAL PORT 13 VIDEO ENCODER AND FILTER 13 HDMI ENCODER 14 AUDIO OUTPUTS 14 ON BOARD LEDS 14 ON BOARD SWITCH 14 RESET SWITCH GPIO BUTTON 14 SDHC SD FLASH SLOT 14 NAND FLASH 15 ETHERNET 15 USB 15 APPENDIX A 16 FLOW CHART FOR REPAIR CENTER USE 16 1 POWER START 16 2 POWER LED COMES ON NO SERIAL POR...

Страница 3: ...Display the Compact has many different control interfaces built in to allow the sign to be controlled There are several different models of Brightsign Compact that Roku sells This hardware manual will document all the features on the Compact even though certain models of the Compact may not have every feature For example only some models of the Compact have the Ethernet interface Brightsign This i...

Страница 4: ...a product under development Its characteristics and specifications are subject to change without notice Roku assumes no obligation regarding future manufacturing unless otherwise agreed to in writing www rokulabs com Roku 2008 Compact Block Diagram ...

Страница 5: ...he customer must test the cable to see if it will work Generally higher quality cables with lower capacitances can be run longer than cheaper cables Power Connector The power connector on our board is rated at 5V 3A The plug to go into our connector is standard 5 5MM plug center positive with a 1 65MM center pin hole The power is over voltage protected and reverse polarity protected with two 5W 6V...

Страница 6: ...t we do have a series resistor of 100 Ohms in each line This connector also allows connecting up external contact closures to ground In order to connect a switch connect one side of the switch to the switch input and connect the other side of the switch to one of the ground pins on the DB25 connector Finally the connector can also supply 3 3V at up to 500mA to an external device The 3 3V output is...

Страница 7: ...lowing pinout pin Description pin Description 1 IR Blaster output 2 Ground 3 Button 6 I O 4 Button 5 I O 5 Button 3 I O 6 Ground 7 Button 1 I O 8 3 3V output 500mA 9 Ground 10 Button 7 I O 11 Ground 12 Button 4 I O 13 Button 2 I O 14 Ground 15 Button 0 I O DA15 female as viewed from the back of Brightsign Compact Roku makes a button LED IR board that can be used to demonstrate how the GPIO and IR ...

Страница 8: ...thout notice Roku assumes no obligation regarding future manufacturing unless otherwise agreed to in writing www rokulabs com Roku 2008 In this example schematic we are using a Vishay TSOP39338 IR receiver which can operate properly on 3 3V The TSOP39138 will also work We are using a Honeywell SEP8506 003 IR Diode as the IR blaster output ...

Страница 9: ... speed 480 mbit USB host port Maximum cable length is 5 Meters The port has the following pinout pin Description pin Description 1 VBUS 2 D 3 D 4 Ground DB15 VGA connector The VGA connector is able to output RGB video The connector has the following pinout pin Description pin Description 1 RED analog video output 2 GREEN analog video output 3 BLUE analog video output 4 NC 5 Digital ground 6 Analog...

Страница 10: ...hones directly If you need to drive headphones look into our Brightsign Expander module which can drive 3 sets of 5 Ohm headphones directly The audio connector has the following pinout Tip Left audio Ring Right audio Base Ground for audio signal HDMI connector The HDMI connector is used to send digital video and audio to HDMI enabled sink devices This is the pinout of the HDMI connector pin Descri...

Страница 11: ...ion of peripherals that will exceed 2A draw If more than 2A is drawn then the external power supply will shut down due to overcurrent conditions The unit will not be damaged but it may cause the unit to reboot or to not operate properly until the overload is removed This 2A can be shared any way you like on the following connectors Ethernet About 180mA when transferring data USB 1500mA max USB spe...

Страница 12: ...es to a product under development Its characteristics and specifications are subject to change without notice Roku assumes no obligation regarding future manufacturing unless otherwise agreed to in writing www rokulabs com Roku 2008 Mechanical ...

Страница 13: ...tructs the PNX8935 to continue the boot process by reading additional code from the on board NAND flash This flash can be updated in the field either from on the flash slots or USB mass storage Part of the NAND flash is also used to hold non volatile parameters The contents of the boot flash is copied into the SDRAM then the PNX8935 jumps to the boot code There is also a serial settings flash that...

Страница 14: ...KHz AUD_BITCLK signal is typically 64 times higher than AUD_LRCIN The AUD_MCLK is usually 4 times faster than the AUD_BITCLK signal The I2S audio is also routed to the HDMI chip The audio output from the AK4420 DAC is sent directly to the audio output jack The AK4420 can drive a 5K load with a 2V RMS signal On Board LEDs There are 4 on board LEDs as follows Green Flash Activity LED one anytime the...

Страница 15: ...e PNX8950 Ethernet 10 100 Base T Ethernet is implemented on the HD2000 by a Realtek RTL8100C PHY controller This device takes the PNX8950 Ethernet signals and converts them to the differential Ethernet signals The PHY chip is also connected to an on board Ethernet magnetic and a RJ45 for cable termination The DM9161 chip is able to signal to the PNX8950 that its state has changed by toggling the I...

Страница 16: ...ation regarding future manufacturing unless otherwise agreed to in writing www rokulabs com Roku 2008 Appendix A Flow Chart for Repair Center Use 1 Power Start Check U17 L3 C204 Check D12 D33 for shorts Is the Voltage of L2 5V Is the Voltage of TP16 3 3V No No Yes Yes No LEDs on Is the Output power adapter 5V DC Replace Power Adapter No Check U33 Reset circuit U36 R76 D5 ...

Страница 17: ... 2 Power LED comes on no serial port output Check U15 U36 S2 Check U3 Y3 C186 C187 R134 Nand flash U25 Check U20 L6 C223 Is there 1 2V DC at TP20 Is there 16MHz at TP7 Is RESET_L high at pin 1 of U15 after powerup No No No Yes Yes No serial port output Is there 2 5V DC at TP18 Check U18 L5 C212 No Yes No Check U3 Check nand contents U25 check nand bus check sdram Is SYS_RES_OUT_N high at C188 afte...

Страница 18: ...ck for audio bit clock R9 should be of the MCLK Check for LRCLK on R11 should be 44 1KHz or 48KHz Check for audio data on R13 Check passives on outputs of U1 The voltage output of the audio during this test fullscale is 2V RMS with no load Check AUD_AVCC5V power supply D Connect a Roku Brightsign Compact Test board to the DA15 Run the following script to test the LEDs If any LED fails to come on t...

Страница 19: ...ment Its characteristics and specifications are subject to change without notice Roku assumes no obligation regarding future manufacturing unless otherwise agreed to in writing www rokulabs com Roku 2008 General troubleshooting notes 1 VTT 1 25V should be half of VDD 2 5V ...

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